Hundreds of NYPD cops streamed into an Islip, LI, funeral home yesterday to say goodbye to Michael Pigott, the lieutenant who killed himself Thursday, a week after ordering the fatal Taser takedown of a mentally ill man.

“Our unit probably lost the best supervisor we had,” an Emergency Services Unit officer said.

Cops from Pigott’s ESU squad consoled the 21-year veteran’s widow, Susan, and their three kids. His union had told Pigott, 46, that he’d likely face only departmental action in the Sept. 24 death of Iman Morales, 35, in Brooklyn.